1
time(period, interval)
1
volume(time, period, interval)
0
advancement
0
allowance(opening, authorization, permission, go-ahead)
0
amplitude(time, period, interval)
0
approval(authorization, permission, go-ahead)
0
area(time, period, interval)
0
arena(time, spot, period, location, interval)
0
assart(opening, authorization, permission, go-ahead)
0
authorization(permission, go-ahead)
0
bit(time, period, interval)
0
blank(time, spot, period, location, interval)
0
boss
0
breadth(time, period, interval)
0
break(time, period, interval)
0
capacity(time, period, interval)
0
captain
0
chieftain
0
clearage
0
clearwing
11 years ago|1.2k views|share |citing 
APASmart Define. (2015). headroom thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/headroom/thesaurus/synonyms
ChicagoSmart Define. 2015. "headroom thesaurus" https://smartdefine.org/headroom/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, headroom thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/headroom/thesaurus/synonyms>.
MLASmart Define. "headroom thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/headroom/thesaurus/synonyms>